	function postFile(p_fileObj,p_strUrl,callback)
	{
     	var fileData = p_fileObj; //文件对象              
        //var strFileName = fileData.name;        //文件名  
        //var iFileSize = fileData.size;      //总大小  
		
        //构造一个表单，FormData是HTML5新增的  
        var form = new FormData();   
        form.append("CurUserId", " ");     
        form.append("FileData", fileData);
        
        //alert(iFileSize);
          
        var oReq = new XMLHttpRequest();
        oReq.onreadystatechange = function()
        {
        		if(oReq.readyState == 4 && oReq.status == 200)
    			{
    				callback(oReq.response);      
    
			}      
        };
        oReq.responseType = "json";
		oReq.open("POST",p_strUrl);
		oReq.send(form);  
    }         
